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First we need to know how many of 100 people will eat it. Let's assume each person eats 1/2 cups. You'd make 50 cups = ~3 gallons. So around 3 gallons, in my opinion, would be enough. There will be people who eat none leaving extra for people who eat a lot. If you know the people coming aren't big fans, 1-2 gallons should be plenty.

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16y ago

What else can I help you with?